3 seal sets per pack. Each set has 2 seals. ion8 are 100% leak proof water bottles with a vented, smooth liquid flow for rapid hydration. They are sealed using removable food-grade flexible silicone seals, which can be replaced in case of loss, damage or degradation over time. These seal sets are phthalate free, non-toxic and are the same as the original seals from a new bottle.